Table 1. IC₅₀ values (μmol/L) of naturally occurring pentacyclic triterpenes and ursolic acid derivatives for the inhibition of USP7 in vitro.

Compd	Name	IC50 (μmol/L)
1	Ursolic acid	7.0±1.5
2	Corosolic acid	22.7±2.1
3	Asiatic acid	NAa
4	Madecassic acid	NAa
5	Oleanolic acid	12.5±1.0
6	Hederagenin	33.5±1.0
7	Bayogenin	NAa
8	Polygalacic acid	NAa
9	Pristimerin	21.1±3.2
10	Glycyrrhetic acid	NAa
11	Senegenin	NAa
12	Lupeol	NAa
13	Betulinic acid	33.3±2.6
14	—	NAa
15	—	NAa

^aNA=no activity (IC₅₀ >50 μmol/L).